US3765452A - Proportional control valve for gas burners - Google Patents

Proportional control valve for gas burners Download PDF

Info

Publication number
US3765452A
US3765452A US00229765A US3765452DA US3765452A US 3765452 A US3765452 A US 3765452A US 00229765 A US00229765 A US 00229765A US 3765452D A US3765452D A US 3765452DA US 3765452 A US3765452 A US 3765452A
Authority
US
United States
Prior art keywords
gas
chamber
diaphragm
valve
throttle valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00229765A
Other languages
English (en)
Inventor
J Charron
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saunier Duval SA
Original Assignee
Saunier Duval SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saunier Duval SA filed Critical Saunier Duval SA
Application granted granted Critical
Publication of US3765452A publication Critical patent/US3765452A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/38—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side
    • F16K31/385—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side the fluid acting on a diaphragm
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/005—Regulating fuel supply using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F23N1/087—Regulating fuel supply conjointly with another medium, e.g. boiler water using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/06—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bellows; using diaphragms
    • F23N5/065—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bellows; using diaphragms using electrical or electromechanical means
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/005—Control of flow characterised by the use of auxiliary non-electric power combined with the use of electric means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/14—Fuel valves electromagnetically operated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/16—Fuel valves variable flow or proportional valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/18—Groups of two or more valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/20—Membrane valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2241/00—Applications
    • F23N2241/04—Heating water
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86928—Sequentially progressive opening or closing of plural valves
    • Y10T137/86936—Pressure equalizing or auxiliary shunt flow
    • Y10T137/86944—One valve seats against other valve [e.g., concentric valves]
    • Y10T137/86984—Actuator moves both valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86928—Sequentially progressive opening or closing of plural valves
    • Y10T137/87016—Lost motion

Definitions

  • the gas control valve of the present invention employs a throttle valve mechanism which is operated by a diaphragm, one side of the diaphragm being in communication with the gas inlet and the other side being open to a chamber in which the pressure is controlled to effect movement of the diaphragm.
  • the pressure in this second chamber is adjusted by a pilot valve I which in turn is operated by electromotive means responsive to a control signal of the type which alternates between first and second predetermined states, i.e. a squarewave.
  • a control signal of the type which alternates between first and second predetermined states, i.e. a squarewave.
  • gas In the first state of the signal, gas is admitted from the inlet to the second chamber and in the second state, gas is vented from the second chamber.
  • the size of the chamber is sufficiently large in relation to the rates at which gas is admitted to-and vented from the second chamber so that fluctuations in the second chamber pressure at the control signal frequency are substantially damped. Accordingly, the pressure in the second chamber is variable as a function of the duty cycle of the control signal and the gas flow through the valve is likewise controllably variable.
  • Diaphragm 8 carries an axial rod 17 which is biased downwardly by a tension spring 21.
  • Tension in spring 21 isadjustable by means of a screw 22, access to the screw 22 being had through a plug 28 in housing 1.
  • a throttle valve member 19 is slidable vertically on rod 17 to an extent limited by a stop 20 on the rod thereby providing a lost-motion connection. This member 19 is biased downwardly relative to the diaphragm and the rod 27 by means of a spring 18.
  • the throttle valve member 19 cooperates with a port 30 in the housing 1 to form a throttle opening of variable cross-sectional area.
  • throttle member 19 As illustrated, the lower portion of throttle member 19 is rounded so that the throttle opening increases as the member 19 is raised relative to the housing.
  • Member 19 includes a series of radially extending legs 31 which engage the housing as illustrated and limit the downward movement of the throttle member so that a predetermined minimum throttle opening is provided when the throttle member is in its lowermost position as illustrated in the drawing.
  • Diaphragm 8 also carries a stiff center plate 32 which co-operates with a seat 3 formed in the valve housing 1 to form a valve which can be completely closed to completely block flow from inlet 2 to outlet 25.
  • the chamber 7 between the completely shutable valve and the throttle valve is bypassed by a metering orifice 27.
  • the area of this bypass is selected, in conjunction with the minimum throttle valve area, to provide a minimal gas flow appropriate for initial lighting of the burner or to establish a minimum thermal output of the burner. If desired, an adjustment screw may be provided at this point for flow leveladjustment.
  • a calibrated orifice 10 is provided for admitting gas from inlet 2 into the control chamber 5 and a second calibrated orifice 9 is provided, in alignment with orifice 10, for venting gas from the control chamber.
  • the venting orifice 9 may be connected, as illustrated, to a pilot flame 14 for burning off the vented gas.
  • One arm of a lever 13, pivoted at 12, extends into the space between the two orifices and is arranged so that, as the lever is rocked, one of the orifices is blocked while the other is open to control chamber 5.
  • An electromagnet 16 operates on an armature 3 4 which is mounted on the opposite arm of lever 13 and spring 15 biases the lever 13 so that the armature 34 is normally held away from the electromagnet 16. In this position, the orifice 9 is blocked and the orifice 10 is open.
  • Theparameters of the electromagnet 16 and armature 34 are selected so that the electromotive means thereby formed responds relatively quickly and accurately to squarewave control signals, i.e. signals which alternate between one state and another at a substantially predetermined frequency.
  • the armature 34 In one state of the control signal, i.e. when a substantial voltage is applied to the electromagnet, the armature 34 is attracted so that the orifice 10 is closed while the orifice 9 is open.
  • the bias provided by spring 15 closes the orifice 9 and opens the orifice 10.
  • the size of the chamber 5 is selected in relation to the sizes of the calibrated orifices 9 and 10 and the nominal frequency of the squarewave control signal so that the pressure in chamber 5 does not fluctuate appreciably within each cycle of the control signal.
  • the pressure within the chamber 5 is variable as a function of the duty cycle of the control signal.
  • the lifting of the throttle member 19 then provides a progressive increase in throttle opening area as the diaphragm 8 rises further in response to reduced pressure within the chamber 5. Since the throttle opening, and therefore the gas flow through the valve, is variable in response to corresponding variation in pressure within the control chamber 5, it can be seen that the valve of the present invention is capable of providing a true proportional control.
  • a gas control valve providing proportional control of gas flow between an inlet and an outlet, said valve comprising: v
  • a first chamber which is in communication with said inlet and, on the other side of said diaphragm, a second chamber;
  • a throttle valve for controlling the passage of gas from said inlet to said outlet, said throttle valve having at least one movable member mechanically coupled to said diaphragm with the flow of gas through the throttle valve being thereby controllable as a function of the position of said diaphragm;
  • electromotive means which is responsive to a control signal which alternates between first and second states at a substantially predetermined frequency and variable duty cycle;
  • pilot valve means controlled by said electromotive means for admitting gas from said inlet to said second chamber when said control signal is in said first state and for venting gas from said second chamber when said control signal is in said second state, said second chamber being sufficiently large in relation to the rate at which gas is admitted to and vented from said second chamber that fluctuations in the second chamber pressure at said frequency are substantially damped and the pressure in said second chamber is variable as a function of the duty cycle of said control signal whereby the gas flow through said valve is'also variable as a function of the duty cycle of said control signal.
  • a gas control valve providing proportional control of gas fiow between an inlet and an outlet, said valve comprising:
  • a first chamber which is in communication with said inlet and, on the other side of said diaphragm, a second chamber;
  • a fully closable valve coupled to said diaphragm
  • throttle valve for controlling the passage of gas from said inlet to said outlet, said throttle valve having at least one movable member mechanically coupled to said diaphragm through a lost motion connection, said throttle valve providing a predetermined minimum gas fiow at the initial position of said member with the flow of gas through the throttle valve being thereafter controllable as a function of the position of said diaphragm;
  • a lever which can be oscillated between a first position in which said first orifice is blocked and said second orifice is open and a second position in which said second orifice is blocked and said first orifice is open;
  • electromotive means responsive to a control signal which alternates between first and second states at a substantially predetermined frequency and variable duty cycle, for substantially synchronously rocking said lever between its first and second positions, said second chamber being sufficiently large I in relation to the rate at which gas is admitted to and vented from said second chamber that fluctuations in the second chamber pressure at said frequency are substantially damped and the pressure in said second chamber is variable as a function of the duty cycle of said control signal whereby, after an initial flow of minimum volume is established, the gas flow through said valve is variable as a function of the duty cycle of said control signal.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Magnetically Actuated Valves (AREA)
  • Fluid-Driven Valves (AREA)
  • Feeding And Controlling Fuel (AREA)
US00229765A 1971-03-02 1972-02-28 Proportional control valve for gas burners Expired - Lifetime US3765452A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7107086A FR2127263A5 (es) 1971-03-02 1971-03-02

Publications (1)

Publication Number Publication Date
US3765452A true US3765452A (en) 1973-10-16

Family

ID=9072728

Family Applications (1)

Application Number Title Priority Date Filing Date
US00229765A Expired - Lifetime US3765452A (en) 1971-03-02 1972-02-28 Proportional control valve for gas burners

Country Status (8)

Country Link
US (1) US3765452A (es)
BE (1) BE778129A (es)
DE (1) DE2205291C2 (es)
FR (1) FR2127263A5 (es)
GB (1) GB1347215A (es)
IT (1) IT947472B (es)
NL (1) NL7201780A (es)
SU (1) SU559664A3 (es)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4267820A (en) * 1977-10-28 1981-05-19 Saunier Duval Control mechanism for a gas-fired water heater
US4418886A (en) * 1981-03-07 1983-12-06 Walter Holzer Electro-magnetic valves particularly for household appliances
US4770161A (en) * 1986-03-06 1988-09-13 Chaffoteaux & Maury Gas water heaters or bath heaters
FR2685752A1 (fr) * 1991-12-31 1993-07-02 Gaz De France Procede de modulation en continu d'un debit de fluide, a l'aide d'un clapet sequentiel commande electriquement.
EP1170549A2 (de) * 2000-04-18 2002-01-09 Vaillant GmbH Gasbeheizter Durchlauferhitzer
US20080029170A1 (en) * 2006-08-02 2008-02-07 O'reilly Edward Three-in-one valve and control system

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2194295A5 (es) * 1972-07-26 1974-02-22 Saunier Duval
DE2261278C2 (de) * 1972-12-14 1983-12-15 Karl Dungs Gmbh & Co, 7067 Urbach Doppelventil
DE3006587A1 (de) * 1980-02-22 1981-09-10 Robert Bosch Gmbh, 7000 Stuttgart Membrandruckregler
DE3524015A1 (de) * 1984-07-13 1986-02-13 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Gasdruckregler
IT1189548B (it) * 1986-06-13 1988-02-04 Nuovopignone Ind Meccaniche & Regolatore modulatore del gas per caldaie murali
CN109340408B (zh) * 2018-12-06 2024-01-23 杭州老板电器股份有限公司 控制阀及燃气灶
CN112546521B (zh) * 2021-01-14 2022-07-15 成都萍霞青熙商贸有限公司 一种自动消防水带使用清洗回收设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3017863A (en) * 1957-02-15 1962-01-23 Monarch Machine Tool Co Electrical control system
US3118471A (en) * 1958-09-26 1964-01-21 Robertshaw Controls Co Control valve
US3216440A (en) * 1962-08-27 1965-11-09 Curtiss Wright Corp Flapper type hydraulic servo valve for controlling fluid flow
US3433262A (en) * 1965-11-18 1969-03-18 Itt Bilevel pressure regulating valve

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3263693A (en) * 1964-12-31 1966-08-02 Honeywell Inc Pilot control valve and method of making same
US3279498A (en) * 1965-06-16 1966-10-18 Controls Co Of America Dual fluid valve
DE1529151A1 (de) * 1966-07-15 1971-10-14 Saunier Duval Langsam-Zuendeinrichtung fuer Gasgeraete,insbesondere fuer Heiz- und Warmwasserbereiter
FR1501795A (fr) * 1966-08-26 1967-11-18 Saunier Duval Dispositif de régulation électronique de température pour chaudière à gaz de chauffage central domestique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3017863A (en) * 1957-02-15 1962-01-23 Monarch Machine Tool Co Electrical control system
US3118471A (en) * 1958-09-26 1964-01-21 Robertshaw Controls Co Control valve
US3216440A (en) * 1962-08-27 1965-11-09 Curtiss Wright Corp Flapper type hydraulic servo valve for controlling fluid flow
US3433262A (en) * 1965-11-18 1969-03-18 Itt Bilevel pressure regulating valve

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4267820A (en) * 1977-10-28 1981-05-19 Saunier Duval Control mechanism for a gas-fired water heater
US4418886A (en) * 1981-03-07 1983-12-06 Walter Holzer Electro-magnetic valves particularly for household appliances
US4770161A (en) * 1986-03-06 1988-09-13 Chaffoteaux & Maury Gas water heaters or bath heaters
FR2685752A1 (fr) * 1991-12-31 1993-07-02 Gaz De France Procede de modulation en continu d'un debit de fluide, a l'aide d'un clapet sequentiel commande electriquement.
EP0550340A1 (fr) * 1991-12-31 1993-07-07 Gaz De France Procédé de modulation en continu d'un débit de fluide, à l'aide d'un clapet séquentiel commandé électriquement
US5388984A (en) * 1991-12-31 1995-02-14 Gaz De France Method of continuous modulation of a fluid flow rate by means of an electrically controlled sequential valve
EP1170549A2 (de) * 2000-04-18 2002-01-09 Vaillant GmbH Gasbeheizter Durchlauferhitzer
EP1170549A3 (de) * 2000-04-18 2004-01-28 Vaillant GmbH Gasbeheizter Durchlauferhitzer
US20080029170A1 (en) * 2006-08-02 2008-02-07 O'reilly Edward Three-in-one valve and control system

Also Published As

Publication number Publication date
GB1347215A (en) 1974-02-27
FR2127263A5 (es) 1972-10-13
DE2205291A1 (de) 1972-09-14
IT947472B (it) 1973-05-21
SU559664A3 (ru) 1977-05-25
BE778129A (fr) 1972-05-16
NL7201780A (es) 1972-09-05
DE2205291C2 (de) 1984-02-23

Similar Documents

Publication Publication Date Title
US3765452A (en) Proportional control valve for gas burners
US6263908B1 (en) Slow opening gas valve
AU615971B2 (en) Gas valve using modular construction
US5735503A (en) Servo pressure regulator for a gas valve
US5294089A (en) Proportional flow valve
US6705342B2 (en) Modulating gas valve with natural/LP gas conversion capability
US7523762B2 (en) Modulating gas valves and systems
US5413141A (en) Two-stage gas valve with natural/LP gas conversion capability
US5215115A (en) Gas valve capable of modulating or on/off operation
US5435343A (en) Two stage natural/LP gas convertible pressure regulator valve with single servo controller
US3433262A (en) Bilevel pressure regulating valve
US4060370A (en) Manifold gas valve with stepped flow operation
US3552430A (en) Stepped opening diaphragm gas valve
JP2001221431A (ja) ガスバルブ
US3036778A (en) Pressure regulator for diaphragm gas valves
US2442145A (en) Photoelectric regulating and safety burner control system
US3749120A (en) Diaphragm gas valve with adjustable opening speed
US3502101A (en) Thermostatic control device with a pressure regulated stepped opened diaphragm valve
US3373765A (en) Electric reset for pneumatic sensor control
US4254796A (en) Gas regulator valve with step opening characteristic
US3796368A (en) Diaphragm operated flow control device
US3880186A (en) Flow control devices
US4217928A (en) Gas regulator valve with step opening characteristic
US3236261A (en) Pressure operated step-opening valve
US3035774A (en) Valve structure and system